Indian shuttlers Saina Nehwal and B. Sai Praneeth stormed into the semi-finals of the $1,20,000 Thailand Open Grand Prix badminton tournament with contrasting wins in the women's and men's singles quarter-finals, respectively, here on Friday.

London Olympics bronze medallist Saina was made to toil hard by Japan's Haruko Suzuki before the Indian used all her experience to bounce back in the third game and clinch it 21-15, 20-22, 21-11.

On the other hand, Singapore Open champion Praneeth had an easy outing, thrashing lower-ranked Thailand's Kantaphon Wangcharoen in straight games 21-16, 21-17 in less than an hour to sail into the semi-finals.